scholarly journals Plastic Anisotropy and Formability of Aluminum Alloy Sheets. Influence of material surface condition on cylindrical deep drawability of various aluminum alloy sheets with counter pressure forming.

1998 ◽  
Vol 48 (11) ◽  
pp. 569-575
Author(s):  
Tetsuro OHWUE ◽  
Matsuo USUDA ◽  
Makoto SAGA ◽  
Masao KIKUCHI
Keyword(s):  
Aluminum Alloy ◽  
Surface Condition ◽  
Plastic Anisotropy ◽  
Material Surface ◽  
Deep Drawability ◽  
Counter Pressure

scholarly journals Study on the Influence of Surface Temperature Field of Aluminum Alloy Etched by Laser Water Jet Composite Machining

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3206
Author(s):  
Xuehui Chen ◽  
Xin Xu ◽  
Wei Liu ◽  
Lei Huang ◽  
Hao Li ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Temperature Field ◽  
Surface Temperature ◽  
Process Parameters ◽  
Water Jet ◽  
Laser Machining ◽  
Material Surface ◽  
Laser Etching ◽  
Surface Temperature Field

This paper studies the compound effect of liquid medium and laser on the workpiece and analyses the law of material surface temperature change during the processing. Taking 7075-T6 aluminum alloy as the research object, the surface temperature field of aluminum alloy processed using water-jet-assisted laser machining under different process parameters was simulated using finite element software. In addition, the temperature field of the material surface was detected in real-time using the self-built water-jet-assisted laser machining temperature field detection system, and the processing results were observed and verified using an optical microscope, scanning electron microscope, and energy spectrum analyzer. The results show that when the water jet inflow angle is 45°, the heat-affected area of the material surface is the smallest, and the cooling effect of the temperature field of the material surface is better. Considering the liquidus melting point of 7075 aluminum alloys, it is concluded that the processing effect is better when the water jet velocity is 14 m·s−1, the laser power is 100 W, and the laser scanning speed is 1.2 mm·s−1. At this time, the quality of the tank is relatively good, there are no cracks in the bottom of the tank, and there is less slag accumulation. Compared with anhydrous laser etching, water-jet-assisted laser etching can reduce the problems of micro-cracks, molten slag, and the formation of a recast layer in laser etching and improve the quality of the workpiece, and the composition of the bottom slag does not change. This study provides theoretical guidance and application support for the selection and optimization of process parameters for water-jet-assisted laser etching of aluminum alloy and further enriches the heat transfer mechanism of multi-field coupling in the process of water-jet-assisted laser machining.

Foundry Technique Designing of the Large Scale Thin-Section Casting

2011 ◽  
Vol 121-126 ◽  
pp. 325-329
Author(s):  
Bin Feng He
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloy ◽  
Thin Section ◽  
Large Scale ◽  
Liquid Fraction ◽  
Simulation Software ◽  
Pressure Casting ◽  
Counter Pressure ◽  
Shrinkage Defects ◽  
Filling And Solidification

The FDM numerical simulation software View Cast system was employed to the counter-pressure casting of aluminum alloy large-scale thin-section casting. By analyzing the mold filling and solidification, the distribution of liquid fraction, temperature field were studied. The potential shrinkage defects were predicted to be formed at the top of the casting. A solution towards reducing such defects has been presented. The feeding capacity of the riser was improved. Analysis on the shrinkage proved that the improved riser is an effective method for reduction of defects.

The control of material surface condition for plasma technology to fabricate advanced packaging

2021 ◽  
Author(s):  
Daisuke Hironiwa ◽  
Yasuhiro Morikawa ◽  
Tsuyoshi Kagami ◽  
Takashi Kurimoto ◽  
Kazumasa Horita ◽  
...  
Keyword(s):  
Surface Condition ◽  
Material Surface ◽  
Plasma Technology ◽  
Advanced Packaging

Adsorption Behavior of GTMS on AA2024-T3 Aluminum Alloy and the Application on Surface Pretreatment

2020 ◽  
Vol 984 ◽  
pp. 31-42
Author(s):  
Bing Xue ◽  
Xue Mei Zong ◽  
Can Wang ◽  
Hua Yuan Zhang ◽  
Jing Luo
Keyword(s):  
Aluminum Alloy ◽  
Selective Adsorption ◽  
Surface Condition ◽  
Sol Gel ◽  
Adsorption Behavior ◽  
Second Phase ◽  
Surface Pretreatment ◽  
Pretreatment Method ◽  
Second Phase Particles ◽  
Sol Gel Films

Basing on the study of adsorption behavior of glycidoxypropyl-trimethoxy-silane (GTMS), pretreatment method of AA2024-T3 aluminum alloy for sol-gel films was optimized. The morphology, composition and corrosion protective performance of alloy coated with the films were investigated by using FE-SEM, EDS, AFM and EIS. The results showed that the Al matrix exhibited better ability to adsorb GTMS molecules than the second phase particles, especially at lower concentration of GTMS. Further, the 5% GTMS films cover the whole surface, but the selective adsorption behaviors still exist. It was concluded that less second phase particles and smoother surface were benefit to the sol-gel films on aluminum alloy. Depending on this conclusion, the pretreatment method for sol-gel films was optimized. The optimized surface condition conducted with 50 g•L-1 sodium hydroxide and ultrasound at 60 oC for 30 s was obtained. These samples coated with the sol-gel films revealed good anti-corrosion performance. The coverage degree of the films was up to 97.95 %.

scholarly journals Experimental and Finite Element Analysis of Asymmetric Rolling of 6061 Aluminum Alloy Using Two-Scale Elasto-Plastic Constitutive Relation

2017 ◽  
Vol 62 (4) ◽  
pp. 1991-1999 ◽  
Author(s):  
M. Wronski ◽  
K. Wierzbanowski ◽  
S. Wronski ◽  
B. Bacroix ◽  
P. Lipinski
Keyword(s):  
Finite Element ◽  
Aluminum Alloy ◽  
Plastic Anisotropy ◽  
Rolling Process ◽  
Sample Thickness ◽  
Constitutive Law ◽  
Scale Model ◽  
Asymmetric Rolling ◽  
Element Analysis ◽  
6061 Aluminum Alloy

AbstractThe goal of this work was theoretical and experimental study of micro- and macroscopic mechanical fields of 6061 aluminum alloy induced by the asymmetric rolling process. Two-scale constitutive law was used by implementing an elasto-plastic self-consistent scheme into the Finite Element code (ABAQUS/Explicit). The model was applied to study the asymmetric rolling. Such a deformation process induces heterogeneous mechanical fields that were reproduced by the model thanks to the crystallographic nature of constitutive law used. The studied material was processed, at room temperature, in one rolling pass to 36% reduction. The resulting material modifications were compared with predictions of the two-scale model. Namely, the calculated textures were compared with experimental ones determined by X-ray diffraction. Especially, detailed quantitative analysis of texture variation across the sample thickness was done. The influence of this texture variation on plastic anisotropy was studied. The advantages of asymmetric rolling process over symmetric one were identified. The main benefits are a nearly homogeneous crystallographic texture, reduced rolling normal forces and homogenization of plastic anisotropy through the sample thickness.

scholarly journals Plastic Anisotropy and Formability of Aluminum Alloy Sheets. Spread rolling of 1050 aluminum strips.

1998 ◽  
Vol 48 (11) ◽  
pp. 581-584 ◽  
Author(s):  
Hiroshi UTSUNOMIYA ◽  
Yoshihiro SAITO ◽  
Tetsuo SAKAI ◽  
Shigemoto MATSUEDA ◽  
Takao SEKINO
Keyword(s):  
Aluminum Alloy ◽  
Plastic Anisotropy

Press-Formability of Aluminum Alloy Sheets of Solution-Hardening Type

1983 ◽  
Vol 105 (4) ◽  
pp. 235-242 ◽  
Author(s):  
N. Kawai ◽  
T. Mori ◽  
T. Nozaki
Keyword(s):  
Aluminum Alloy ◽  
Fracture Behavior ◽  
Plastic Anisotropy ◽  
Weight Ratio ◽  
High Strength ◽  
Solution Hardening ◽  
Solution Type ◽  
Metal Sheets ◽  
The Press ◽  
Press Formability

Recently, formable metal sheets with a high strength-to-weight ratio have been developed especially to conserve energy and resources. For this purpose, two conditions are necessary: the strengthening of the sheet metal and improvement of the press-formability, which are difficult to obtain together. In the present study, the conditions necessary for this are examined using solid-solution type aluminum alloy sheets. Moreover, a new measure to assess press-formability is proposed in terms of the strain-hardening capability and plastic-anisotropy based on fracture behavior of sheet metals.

Behavior of Thermally Sprayed WC-Co Layers on 5086 Aluminum Alloy and 304 L Stainless Steel

2013 ◽  
Vol 550 ◽  
pp. 41-47
Author(s):  
N. Boualem ◽  
A. Raid ◽  
M.A. Ghaffor ◽  
A. Tlemçani ◽  
M. Derrar
Keyword(s):  
Stainless Steel ◽  
Aluminum Alloy ◽  
Surface Coating ◽  
Surface Condition ◽  
Thermal Spraying ◽  
Operating Conditions ◽  
Average Grain Size ◽  
Indentation Tests ◽  
Materials Used ◽  
Thermally Sprayed

Thermal spraying is a process for surface coating by projecting a material in powder or in wire form on a material with a previously prepared surface. The materials used in our study are 5086 aluminum alloy and 304 L stainless steel with various surface qualities: polished 120, mirror polished and sandblasted. The projection powder is a combination of "ceramic-metal" WC-Co whose average grain size is 30 microns. The layers thicknesses obtained after 3 passes vary between 90 and 120 microns depending on the operating conditions: gas protection, temperature and surface condition. Indentation tests at the substrate-layer interface and micrographic sections revealed the roughness importance to allow a better layers grip.

INFLUENCE OF SURFACE CONDITION OF CYLINDRICAL INGOTS FROM ALUMINUM ALLOY OF SERIES 6000 ON CORROSION RESISTANCE

Metallurg ◽  
2021 ◽  
pp. 52-59
Author(s):  
D.V. Pronichev ◽  
L.M. Gurevich ◽  
O.V. Slautin ◽  
V.G. Kharlamov ◽  
N.N. Kanubrokov ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Surface Condition
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